The Gudetama cookbook is available via bookstores (physical and digital) in Japan, as well as on websites like Amazon.
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In promotional material for the Gudetama cookbook, Sanrio assures readers that the cookbook lacks motivation as well. This isn’t just a reference to how Gudetama spends all day lazing around.
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The name of the recipe book is “Gudetama’s No Egg No Life: If you have eggs, you can relax.”
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Sanrio will release a cookbook in which Gudetama will teach you all the different ways to cook eggs.